Denoising Method Based on Spectral Subtraction in Time-Frequency Domain

Table 2

S/R and RMSE after denoising under different filter coefficients.

Data with noise	Weighted variance coefficient	S/R (dB)		RMSE
		Before denoising	After denoising
Linear model	11	0	3.401	0.626
	15	0	5.639	0.484
	19	0	5.859	0.472
	23	0	5.168	0.511
	27	0	5.117	0.522